Michael Scott Elder

US Patent:

6403772, Jun 11, 2002

Filed:

Mar 6, 1998

Appl. No.:

09/029801

Inventors:

John A. Ewen - Houston TX
Robert W. Strozier - Houston TX
Michael J. Elder - Elkton MD

Assignee:

Montell Technology Company, BV

International Classification:

C07F 708

US Classification:

532 9, 556 11, 556 22, 556 23, 556 43, 556 46, 556 47, 556 52, 556 53, 556 90, 556126, 534 15, 502102, 502103, 502117, 502152, 502154, 502158

Abstract:

New metallocene compounds are described where the ligand contains at least one open-pentadienyl containing radical characterized by a cyclic or acyclic, six electron, delocalized, five atomic center structure. These metallocenes can advantageously be used in catalyst systems for the polymerization of olefins to generate a wide variety of different polymers including HDPE, LLDPE, ethylenelpropylene/(diene) elastomers, tactiospecific C3+-olefin polymers, intimate mixture thereof and the like.

US Patent:

6444833, Sep 3, 2002

Filed:

Dec 15, 1999

Appl. No.:

09/461858

Inventors:

John A. Ewen - Houston TX
Michael J. Elder - Elkton MD
Robert L. Jones - Elkton MD

Assignee:

Basell Technology Company BV - Hoofddorp

International Classification:

C07F 1700

US Classification:

556 11, 556 12, 556 21, 556 28, 556 30, 556 43, 556 53, 556 58, 556 70, 556 87, 556406, 534 11, 534 15, 549 3, 549 32, 502103, 502117, 526160, 526943

Abstract:

A class of metallocene compounds is disclosed having the general formula (I): wherein Y is a moiety of formula (II) wherein A, B and D, same or different from each other, are selected from an element of the groups 14 to 16 of the Periodic Table of the Elements (new IUPAC version), with the exclusion of nitrogen and oxygen; R , R , R , R and R are hydrogen or hydrocarbon groups, Z is selected from a moiety of formula (II) as described above and from a moiety of formula (III): wherein R , R , R and R , are hydrogen or hydrocarbon groups; L is a divalent bridging group; M is an atom of a transition metal selected from those belonging to group 3, 4, 5, 6 or to the lanthanide or actinide groups in the Periodic Table of the Elements (new IUPAC version), X, same or different, is hydrogen, a halogen, a R , OR , OSO CF , OCOR , SR , NR or PR group, wherein the substituents R are hydrogen or alkyl groups; p is an integer of from 0 to 3, being equal to the oxidation state of the metal M minus 2. The above metallocenes are particular useful in the polymerization of propylene.

US Patent:

7851644, Dec 14, 2010

Filed:

Jun 28, 2007

Appl. No.:

11/823802

Inventors:

John A. Ewen - Houston TX, US
Michael J. Elder - Elkton MD, US
Yuri A. Dubitsky - Milan, IT

Assignee:

Basell Polyolefine GmbH - Wesseling

International Classification:

C08F 7/00
C07F 17/00

US Classification:

556 11, 556 12, 556 21, 556 28, 556 30, 556 43, 556 53, 556 56, 556 87, 556408, 556 70, 534 11, 534 15, 549 3, 549 32, 502117, 502103, 526128, 526149, 526150, 5263481, 5263485, 526351, 526352

Abstract:

A new class of heterocyclic metallocenes, a catalytic system containing them and a process for polymerizing addition polymerizable monomers using the catalytic system are disclosed; the heterocyclic metallocenes correspond to the formula (I): YR″ZMeQPwherein Y is a coordinating group containing a six π electron central radical directly coordinating Me, to which are associated one or more radicals containing at least one non-carbon atom selected from B, N, O, Al, Si, P, S, Ga, Ge, As, Se, In, Sn, Sb and Te; R″ is a divalent bridge between the Y and Z groups; Z is a coordinating group, optionally being equal to Y; Me is a transition metal; Q is halogen or hydrocarbon substituents; P is a counterion; i is 0 or 1; j is 1-3; jj is 0-2; k is 1-3; and l is 0-2.

US Patent:

20050192418, Sep 1, 2005

Filed:

Mar 24, 2003

Appl. No.:

10/395686

Inventors:

John Ewen - Houston TX, US
Michael Elder - Elkton MD, US
Robert Jones - Elkton MD, US
Yuri Bubitsky - Milano, IT

International Classification:

C08F004/44
C07F017/00

US Classification:

526160000, 526351000, 526904000, 526943000, 534015000, 534011000

Abstract:

A new class of heterocyclic metallocenes, a catalytic system containing them and a process for polymerizing addition polymerizable monomers using said catalytic system are disclosed; the heterocyclic metallocenes correspond to the formula (I): YR″ZMeQPwherein Y is a coordinating group containing a six π electron central radical directly coordinatng Me, to which are associated one or more radicals containing at least one non-carbon atom selected from B, N, O, Al, Si, P, S, Ga, Ge, As, Se, In, Sn, Sb and Te; R″ is a divalent bridge between the Y and Z groups; Z is a coordinating group, optionally being equal to Y; Me is a transition metal; Q is halogen or hydrocarbon substituents; P is a counterion; i os 0 or 1; j is 1-3; jj is 0-2; k is 1-3; and l is 0-2.

US Patent:

55610927, Oct 1, 1996

Filed:

Mar 30, 1993

Appl. No.:

8/040048

Inventors:

John A. Ewen - Houston TX
Michael J. Elder - Friendswood TX

Assignee:

Fina Technology, Inc. - Dallas TX

International Classification:

B01J 3100

US Classification:

502117

Abstract:

This invention is for a catalyst system comprising a neutral metallocene compound, an aluminum alkyl and a Lewis acid. The Lewis acid must be of sufficient acidity to ionize a neutral metallocene compound to form a cationic metallocene catalyst. The ligands of the Lewis acid should not be reactive with the metallocene cation. Any metallocene catalyst compound having two cyclopentadienyl rings, substituted or unsubstituted, attached to a transition metal which can be ionized by a Lewis acid would be useful in this invention. The invention is also for the process of making the catalyst system and the process for using the catalyst system in polymerization of olefins. The metallocene is contacted with the Lewis acid. The aluminum alkyl is contacted with the olefin. The two mixtures are contacted with each other under polymerization conditions.

US Patent:

53875680, Feb 7, 1995

Filed:

Apr 13, 1992

Appl. No.:

7/867572

Inventors:

John A. Ewen - Houston TX
Michael J. Elder - Raleigh NC

Assignee:

Fina Technology, Inc. - Dallas TX

International Classification:

B01J 3100

US Classification:

502104

Abstract:

This invention uses a new method of producing ionic metallocene compounds. These compounds are useful as catalysts for polymerization of olefins, primarily propylene. This method uses an ionizing agent which ionizes the neutral metallocene compound. The ionizing ionic compound does not contain an active proton and contains a carbonium, oxonium or sulfonium cation. The anion of the ionizing ionic compound is not coordinated or is only loosely coordinated to the metallocene cation and is chemically unreactive with the metallocene cation. Examples of such compounds are triphenylcarbenium tetrakis(pentafluorophenyl)boronate, triphenylcarbenium tris(pentafluorophenyl)phenyl boronate and triphenylcarbeniumtris(pentafluorophenyl)4-trimethylsilyl-2,3,5,6-tetraflu orophenylboronate. The process of making catalysts with this invention produces catalysts having high activity and does not produce by-products which can inhibit catalyst activity. This new synthesis is a clean reaction which does not produce a Lewis base.

US Patent:

56632495, Sep 2, 1997

Filed:

Nov 15, 1994

Appl. No.:

8/339842

Inventors:

John A. Ewen - Houston TX
Michael J. Elder - Raleigh NC

Assignee:

Fina Technology, Inc. - Dallas TX

International Classification:

C08F 4643

US Classification:

526134

Abstract:

This invention uses a new method of producing ionic metallocene compounds. These compounds are useful as catalysts for polymerization of olefins, primarily propylene. This method uses an ionizing agent which ionizes the neutral metallocene compound. The ionizing ionic compound does not contain an active proton and contains a carbonium, oxonium or sulfonium cation. The anion of the ionizing ionic compound is not coordinated or is only loosely coordinated to the metallocene cation and is chemically unreactive with the metallocene cation. Examples of such compounds are triphenylcarbenium tetrakis(pentafluorophenyl)boronate, triphenylcarbenium tris(pentafluorophenyl)phenyl boronate and triphenylcarbenium tris(pentafluorophenyl)4-trimethylsilyl-2,3,5,6-tetrafluorophenylboronate. The process of making catalysts with this invention produces catalysts having high activity and does not produce by-products which can inhibit catalyst activity. This new synthesis is a clean reaction which does not produce a Lewis base.

US Patent:

52428761, Sep 7, 1993

Filed:

Sep 30, 1991

Appl. No.:

7/768783

Inventors:

Edwar S. Shamshoum - Houston TX
Michael J. Elder - Friendswood TX
Baireddy R. Reddy - Baytown TX
David J. Rauscher - Webster TX

Assignee:

Fina Technology, Inc. - Dallas TX

International Classification:

C08F 402

US Classification:

502113

Abstract:

This invention concerns a catalyst system comprising at least one homogeneous catalyst and at least one heterogeneous catalyst, specifically, a metallocene catalyst and a conventional Ziegler-Natta catalyst, respectively. This invention is useful in the polymerization of any polymer in which separate polymerizations with a homogeneous catalyst and with a heterogeneous catalyst are possible, but preferably, polymerization of olefins, more preferably,. alpha. -olefins, and, most preferably, propylene. This invention provides a catalyst system which facilitates use of a homogeneous catalyst but eliminates the disadvantages of such a system. This invention produces a polymer with molecular weight distribution (MWD) as broad or broader than the MWD of the heterogeneous catalyst alone. Hydrogen can be used to control molecular weight distribution of a polymer produced with this invention.